<template>
  <form-item-wrapper :designer="designer" :field="field" :rules="rules" :design-state="designState"
                     :parent-widget="parentWidget" :parent-list="parentList" :index-of-parent-list="indexOfParentList"
                     :sub-form-row-index="subFormRowIndex" :sub-form-col-index="subFormColIndex"
                     :sub-form-row-id="subFormRowId"
                     :in-table-flag="inTableFlag"
                     :column-prop="columnProp"
  >
    <div
        :class="[!!field.options.autoFullWidth ? 'auto-full-width' : '', isReadMode ? 'readonly-mode-date-range' : '']">
      <el-date-picker ref="fieldEditor" :type="field.options.type" v-model="fieldModel"
                      :key="dateRangeKey"
                      :class="[!!field.options.autoFullWidth ? 'auto-full-width' : '']"
                      :disabled="field.options.disabled" :readonly="field.options.readonly"
                      :clearable="field.options.clearable" :editable="field.options.editable"
                      :format="field.options.format" :value-format="field.options.valueFormat"
                      :start-placeholder="field.options.startPlaceholder || i18nt('render.hint.startDatePlaceholder')"
                      :end-placeholder="field.options.endPlaceholder || i18nt('render.hint.endDatePlaceholder')"
                      @focus="handleFocusCustomEvent" @blur="handleBlurCustomEvent"
                      @change="handleChangeEvent">
      </el-date-picker>
      <template v-if="isReadMode">
        <span class="readonly-mode-field">{{ contentForReadMode }}</span>
      </template>
    </div>
  </form-item-wrapper>
</template>

<script>
import FormItemWrapper from './form-item-wrapper'
import emitter from '@/utils/emitter'
import i18n, {translate} from "@/utils/i18n";
import fieldMixin from "@/components/form-designer/form-widget/field-widget/fieldMixin";
import {generateId} from "@/utils/util";

export default {
  name: "date-range-widget",
  componentName: 'FieldWidget',  //必须固定为FieldWidget，用于接收父级组件的broadcast事件
  mixins: [emitter, fieldMixin, i18n],
  props: {
    field: Object,
    parentWidget: Object,
    parentList: Array,
    indexOfParentList: Number,
    designer: Object,

    designState: {
      type: Boolean,
      default: false
    },

    subFormRowIndex: { /* 子表单组件行索引，从0开始计数 */
      type: Number,
      default: -1
    },
    subFormColIndex: { /* 子表单组件列索引，从0开始计数 */
      type: Number,
      default: -1
    },
    subFormRowId: { /* 子表单组件行Id，唯一id且不可变 */
      type: String,
      default: ''
    },

  },
  components: {
    FormItemWrapper,
  },
  data() {
    return {
      oldFieldValue: null, //field组件change之前的值
      fieldModel: null,
      rules: [],
    }
  },
  computed: {
    contentForReadMode() {
      if (!this.fieldModel) {
        return '--'
      } else {
        return this.fieldModel[0] + ' - ' + this.fieldModel[1]
      }
    },

    dateRangeKey() {
      return this.widgetKey || this.field.id
    },

  },
  beforeCreate() {
    /* 这里不能访问方法和属性！！ */
  },

  created() {
    /* 注意：子组件mounted在父组件created之后、父组件mounted之前触发，故子组件mounted需要用到的prop
       需要在父组件created中初始化！！ */
    this.registerToRefList()
    this.initFieldModel()
    this.initEventHandler()
    this.buildFieldRules()

    this.handleOnCreated()
  },

  mounted() {
    this.handleOnMounted()
  },

  beforeUnmount() {
    this.unregisterFromRefList()
  },

  methods: {
    refreshWidgetKey() {  //强制刷新组件！！
      this.widgetKey = 'date-range-key-' + generateId()
    },

  }
}
</script>

<style lang="scss" scoped>
 /* form-item-wrapper已引入，还需要重复引入吗？ */

.full-width-input {
  width: 100% !important;
}

.auto-full-width {
  width: 100%;

  :deep(.ep-date-editor) {
    width: 100% !important;
    padding-left: 0;
    padding-right: 0;
  }

  :deep(.ep-range__icon) {
    margin-left: 10px;
  }
}

.readonly-mode-date-range {
  :deep(.ep-range-editor) {
    display: none;
  }
}

</style>
